Remove from heat; carefully add 2/3 cup water all at once near edge (oil may splatter). Return to heat. Cover and cook 10 minutes more. Increase heat to medium-high. Uncover; cook 3-5 minutes or til filling is no longer pink and water is evaporated.

To make ahead: Cover uncooked potstickers on cookie sheet and refrigerate up to 1 day. Or, place potstickers in a shallow freezer container with a tight-fitting lid. Freeze up to 2 weeks. Let thaw 30 minutes before cooking.